ok this is going to sound childish but maybe you don't realize how CUTE it is that you're a relationship virgin and would LOVE to start get this part of your life rolling with this man, he should feel special if anything ....

If i had a girl like you I would be like Awwwwww at everything you do....
maybe you're afraid that you might screw up due to lack of experience, but he should be understanding that you're not used to this and are willing to explore that part of your life with HIM! ... it's basically like telling him " hey, no one has
captivated me like you in the past years" .. you think he'll be turned off if you rephrase it like that to him, instead of "hey i have no idea what to do in a relationship"